body,p,h1,h2,h3,h4,h5,h6,ul,ol,dl,dt{
    margin: 0;
    padding: 0;
    list-style: none;
    color: #333;
    font-size: 14px;
    // 将页面中所有标签默认行高层叠掉1
    line-height: 1;
}

a{
    text-decoration: none;
    color: #333;
}

img,input{
    vertical-align: middle;
    border: 0 none;
    padding: 0;
}


// 清除浮动
.clearfix::after{
    content: '';
    display: block;
    clear: both;
}

.left{
    float: left;
}
 .right{
    float: right;
 }
.w{
    width: 980px;
    margin: 0 auto;
}